Packing



July 15, 1924.4 l

' C. c. HALL 1'501542 PACKING mied .July 1s. 192s -F- :I 3 nvm: fof,

Chor/65C H! l Patented July l5?, 1924.

Unirse srArssA CHAR- Las o. HALL, or KALAi/rAzoo, MIGHIGAN.

IEACKING.

Application filed July 16, 1923. Serial No. 651,884.

To all. whom t mary concern.' Y

Be it known that I, CHARLES C. I-IALL, a citizen of the United States, residing at the city and county of Kalamazoo, State of Michigan, have invented Certain new and useful' Improvements in Packings, of which the following is a specification.

This invention relates to improvements in packings.

The main object of the invention is to provide an improved packing which is especially well adapted for high pressures and temperatures and is self-lubricating and very durable.

Further objects, and objects relating to structural details, will definitely appear from the detailed description to follow.-

I accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearly illustrated in the acc'ompanying drawing, forming a part of this application, in which:

Fig. I is a plan view of a thin sheet of metal or metal fo-il such as I employ in my improved packing, no regard being had however to dimensions.

Fig. II is a plan view of the sheet crumpled and crinkled and coated with a luricant.

Fig. III is an end elevation illustrating one of the steps of manufacture, the thickness of the metal being greatly exaggerated for convenience in illustration.

Fig. IV is a cross section through my iniproved packing in cylindrical form, the thickness of the material being greatly cx'- aggerated for the purpose indicated.

Fig. V is a cross section through my improved packing compacted to a rectangular cross section, the material being shown of exaggerated thickness for convenience in illustration.

In the drawing similar reference characters refer to similar parts throughout the several views.

Referring to the drawing, I provide thin sheets of metal or metal foil 1 which are crumpled or crinkled and coated with lubricant. A high heat resisting oil and powdered or flaked graphite in the form of a paste is very satisfactory. I have only illustrated one sheet to illustrate this step but it will be understood that I employ sheets of thin copper and sheets of thin aluminum, the copper being indicated at 2 and the aluminum at 3. These sheets are formed of copper and aluminum allo s or at least alloys which are dominate by copper and aluminum. The sheets are preferably about l/lOOO of an inch in thickness, both aluminum y and copper sheets being preferably annealed after rolling.

The coating of lubricant is in practice applied before the crumpling operation. This crumpling produces very irregular surfaces, no attempt being made in the drawing to illustrate this irregularity with exactitude. The coated and crumpled sheets are then rolled into a scroll form with the copper at the outside. The rolled sheets are then compacted into the desired cross section round, as indicated in Fig. IV, or into rectangular cross sectionV as shown in Fig. V. The lubricant is held in pockets in and between the rolled sheets.

My improved packing is adapted to be used as an ordinary .packing by bending around a shaft or compressing into a stuifing box by means of a gland or forcing-into place by the tapering or rarnming tools.

My improved packing has great tensile strength and is highly desirable for use where high temperatures and pressures are present.

My improved packing is particularly well adapted for use as a juno or throat ring, either ahead of the softer packing to prevent the latter being forced out of the box by compression or as a final ring serving the same purpose when the gland does not fit around the rod. The lubricant is effectively held within the packing so that it is selflubricating and very durable and is not likely to cut or score the moving parts. It is very economical in comparison with the cast brass follower rings which are frequentily employed. It is easy to apply as it is not necessary to detach cross heads or brackets or the like as it can be applied iu the form of a strap by simply wrapping around the rod and cutting off the desired length. When made in the form of pressed rings the rings may be split and slipped over the rod.

2. A packing comprising a sheet of aluminum and a sheet of copper crumpled, coated 10 With lubricant, and rolled together into a scroll.

In Witness whereof I have hereunto set my hand and seal.

CHARLES C. HALL. [1.. sl 

